212008436 has 6 divisors (see below), whose sum is σ = 371014770. Its totient is φ = 106004216.

The previous prime is 212008421. The next prime is 212008439. The reversal of 212008436 is 634800212.

It can be written as a sum of positive squares in only one way, i.e., 196168036 + 15840400 = 14006^2 + 3980^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212008439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26501051 + ... + 26501058.

It is an arithmetic number, because the mean of its divisors is an integer number (61835795).

Almost surely, 2^212008436 is an apocalyptic number.

It is an amenable number.

212008436 is a deficient number, since it is larger than the sum of its proper divisors (159006334).

212008436 is a wasteful number, since it uses less digits than its factorization.

212008436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53002113 (or 53002111 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 212008436 is about 14560.5094691086. The cubic root of 212008436 is about 596.2811047271.

Adding to 212008436 its reverse (634800212), we get a palindrome (846808648).

The spelling of 212008436 in words is "two hundred twelve million, eight thousand, four hundred thirty-six".